wm8960 codec driver missing configure its bit clock and frame clock for codec master mode, so add support for it. It will calculate a appropriate frequency dividing ratio according to the system clock, bit clock and frame clock, then set the corresponding registers.

Signed-off-by: Zidan Wang zidan.wang@freescale.com --- sound/soc/codecs/wm8960.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+)

diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index 6fa832b..b072501 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -127,6 +127,8 @@ struct wm8960_priv { struct snd_soc_dapm_widget *out3; bool deemph; int playback_fs; + int bclk; + int sysclk; struct wm8960_data pdata; };

@@ -563,6 +565,72 @@ static struct { { 8000, 5 }, };

+/* Multiply 256 for internal 256 div */ +static const int dac_divs[] = { 256, 384, 512, 768, 1024, 1408, 1536 }; + +/* Multiply 10 to eliminate decimials */ +static const int bclk_divs[] = { + 10, 15, 20, 30, 40, 55, 60, 80, 110, + 120, 160, 220, 240, 320, 320, 320 +}; + +static void wm8960_configure_clocking(struct snd_soc_codec *codec, + bool tx, int lrclk) +{ + struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); + u16 iface1 = snd_soc_read(codec, WM8960_IFACE1); + u16 iface2 = snd_soc_read(codec, WM8960_IFACE2); + u32 sysclk; + int i, j; + + if (!(iface1 & (1<<6))) { + dev_dbg(codec->dev, + "Codec is slave mode, no need to configure clock\n"); + return; + } + + if (!wm8960->sysclk) { + dev_dbg(codec->dev, "No SYSCLK configured\n"); + return; + } + + if (!wm8960->bclk || !lrclk) { + dev_dbg(codec->dev, "No audio clocks configured\n"); + return; + } + + for (i = 0; i < ARRAY_SIZE(dac_divs); ++i) { + if (wm8960->sysclk == lrclk * dac_divs[i]) { + for (j = 0; j < ARRAY_SIZE(bclk_divs); ++j) { + sysclk = wm8960->bclk * bclk_divs[j] / 10; + if (wm8960->sysclk == sysclk) + break; + } + if(j != ARRAY_SIZE(bclk_divs)) + break; + } + } + + if (i == ARRAY_SIZE(dac_divs)) { + dev_err(codec->dev, "Unsupported sysclk %d\n", wm8960->sysclk); + return; + } + + /* + * configure frame clock. If ADCLRC configure as GPIO pin, DACLRC + * pin is used as a frame clock for ADCs and DACs. + */ + if (iface2 & (1<<6)) + snd_soc_update_bits(codec, WM8960_CLOCK1, 0x7 << 3, i << 3); + else if (tx) + snd_soc_update_bits(codec, WM8960_CLOCK1, 0x7 << 3, i << 3); + else if (!tx) + snd_soc_update_bits(codec, WM8960_CLOCK1, 0x7 << 6, i << 6); + + /* configure bit clock */ + snd_soc_update_bits(codec, WM8960_CLOCK2, 0xf, j); +} + static int wm8960_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) @@ -570,8 +638,13 @@ static int wm8960_hw_params(struct snd_pcm_substream *substream, struct snd_soc_codec *codec = dai->codec; struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); u16 iface = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3; + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; int i;

+ wm8960->bclk = snd_soc_params_to_bclk(params); + if (params_channels(params) == 1) + wm8960->bclk *= 2; + /* bit size */ switch (params_width(params)) { case 16: @@ -602,6 +675,9 @@ static int wm8960_hw_params(struct snd_pcm_substream *substream,

/* set iface */ snd_soc_write(codec, WM8960_IFACE1, iface); + + wm8960_configure_clocking(codec, tx, params_rate(params)); + return 0; }

@@ -946,6 +1022,30 @@ static int wm8960_set_bias_level(struct snd_soc_codec *codec, return wm8960->set_bias_level(codec, level); }

+static int wm8960_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct snd_soc_codec *codec = dai->codec; + struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); + + switch (clk_id) { + case WM8960_SYSCLK_MCLK: + snd_soc_update_bits(codec, WM8960_CLOCK1, + 0x1, WM8960_SYSCLK_MCLK); + break; + case WM8960_SYSCLK_PLL: + snd_soc_update_bits(codec, WM8960_CLOCK1, + 0x1, WM8960_SYSCLK_PLL); + break; + default: + return -EINVAL; + } + + wm8960->sysclk = freq; + + return 0; +} + #define WM8960_RATES SNDRV_PCM_RATE_8000_48000

#define WM8960_FORMATS \ @@ -958,6 +1058,7 @@ static const struct snd_soc_dai_ops wm8960_dai_ops = { .set_fmt = wm8960_set_dai_fmt, .set_clkdiv = wm8960_set_dai_clkdiv, .set_pll = wm8960_set_dai_pll, + .set_sysclk = wm8960_set_dai_sysclk, };

static struct snd_soc_dai_driver wm8960_dai = {